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Battery storage projects in Washington

3 operating battery storage projects in Washington with 4 MW of battery capacity, largest first. From EIA-860M, August 2026.

Projects

3

Battery capacity

4 MW

Net generation, 2025

5.22 GWh

Largest

Glacier Battery Storage

2 MW

Largest battery storage projects in Washington

#PlantBattery MW2025 net generation, GWhGWh, 2025Operator
1Glacier Battery StorageWhatcom County2.00.0Puget Sound Energy Inc
2Horn Rapids Solar, Storage and TrainingBenton County · Solar and battery storage1.04.6Energy Northwest
3Arlington MicrogridSnohomish County · Solar and battery storage1.00.6PUD No 1 of Snohomish County - (WA)

Every project with battery storage, solar and wind hybrids included. MW is battery nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources

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All plants in WashingtonLargest battery storage projects in the US